Low Energy Consequences of Five Dimensional SO(10)

We consider five dimensional (5D) supersymmetric SO(10) compactified on the orbifold S/(Z2 × Z ′ 2) such that the SO(10) gauge symmetry is broken on both fixed points (branes), and the residual gauge symmetry is SU(3)c × SU(2)L×U(1)Y ×U(1)X . We explore one example in which the gauge symmetries on the two branes are respectively SU(5)×U(1) and SU(4)c × SU(2)L × SU(2)R, and the MSSM gauge symmetry is recovered by the usual Higgs mechanism. We discuss how fermion masses and mixings can be understood in this framework by introducing a flavor U(1)F symmetry. Unification of the MSSM gauge couplings and proton stability are also considered. An order of magnitude increase in sensitivity could reveal proton decay. [email protected] [email protected] [email protected]